P1A00 on 2013-2018 Ford C-Max — Motor Electronics Coolant Pump Performance
1 vehicles · 1 makes · $150-$5,000 repair
Most Reported On
P1A00 is an OBD-II diagnostic trouble code meaning “Motor Electronics Coolant Pump Performance.” This manufacturer-specific code refers to a performance problem with the motor electronics (inverter/converter) coolant pump on a hybrid or electric vehicle. The power electronics that drive the electric motor generate significant heat, and a dedicated electric coolant pump circulates coolant through them to keep them within safe temperatures. The computer monitors coolant flow and temperature, and when the pump isn't moving coolant adequately, it sets this performance code, which can lead to reduced power or limited hybrid operation to prevent overheating damage. The most common root is a weak or failed electric coolant pump, but air pockets, low coolant, or restrictions can also trigger it. This code is most commonly reported on 2013-2018 Ford C-Max, with repair costs ranging from $150 to $5,000.
Common Causes
Typical Repair Cost
Based on 1 documented vehicle-specific issues. Actual cost depends on root cause and vehicle.
Diagnostic Tools
To diagnose P1A00, you'll need an OBD-II scanner. Here are our recommendations at every price point.
ANCEL AD310 Classic OBD-II Scanner
by ANCEL
A simple, affordable code reader that reads and clears check engine codes. Great for quick diagnostics on any OBD-II vehicle (1996+).
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BlueDriver Pro Bluetooth Scanner
by BlueDriver
Bluetooth OBD-II scanner with a free companion app. Provides enhanced diagnostics, smog readiness, and repair reports sourced from a database of verified fixes.
- Enhanced diagnostics (ABS, SRS, transmission)
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- Smog check readiness
- Free app (iOS & Android)
LAUNCH CRP123X OBD-II Scanner
by LAUNCH
A professional-grade handheld scanner that reads all four major systems (engine, transmission, ABS, SRS) with live data streaming and graphing.
- Engine, transmission, ABS, SRS diagnostics
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Autel MaxiCOM MK808S Diagnostic Tool
by Autel
Shop-level diagnostic tablet with bi-directional control, active tests, and full system coverage. Ideal for serious DIYers and small shops.
- All-system diagnostics (25+ modules)
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- Oil reset, EPB, BMS, TPMS, injector coding
- 7-inch touchscreen with Android OS
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FAQ
What does P1A00 mean?
P1A00 stands for "Motor Electronics Coolant Pump Performance." This manufacturer-specific code refers to a performance problem with the motor electronics (inverter/converter) coolant pump on a hybrid or electric vehicle. The power electronics that drive the electric motor generate significant heat, and a dedicated electric coolant pump circulates coolant through them to keep them within safe temperatures. The computer monitors coolant flow and temperature, and when the pump isn't moving coolant adequately, it sets this performance code, which can lead to reduced power or limited hybrid operation to prevent overheating damage. The most common root is a weak or failed electric coolant pump, but air pockets, low coolant, or restrictions can also trigger it.
What are the most common causes of P1A00?
The most common causes of P1A00 are: Failed or weak motor electronics (inverter) coolant pump, Air pockets in the inverter cooling circuit (after service or leak), Low coolant level from a leak in hoses or reservoir, Blocked or restricted coolant passages/radiator, Contaminated or degraded coolant reducing flow/heat transfer, Damaged or corroded pump wiring/connector, Faulty coolant temperature sensor, Faulty hybrid/inverter control module (rare). The specific cause varies by vehicle.
How much does it cost to fix P1A00?
Repair costs for P1A00 range from $150 to $5,000, depending on the vehicle and root cause.
Which vehicles are affected by P1A00?
Au7o has documented P1A00 across 1 vehicle models from 1 manufacturers: Ford.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.